Pretest

Question 1

Which best compares 1 mol of sodium chloride to 1 mol of aluminum chloride?

Revolt · Accepted Answer

Both are made up of 6 point 0 2 times 10 to the 23th power formula units.

Question 2

How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?

Revolt · Accepted Answer

Each sample has the same number of molecules.

Question 3

Which value gives the number of particles in 1 mol of a substance?

Revolt · Accepted Answer

6 point 0 2 times 10 to the 23th power

Question 4

What is the relationship between a mole and Avogadro’s number?

Revolt · Accepted Answer

A mole contains Avogadro’s number of particles of a substance.

Question 5

What is Avogadro’s number?

Revolt · Accepted Answer

the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance

Question 6

In a classroom, which comparison would a teacher most likely use for describing a mole?

Revolt · Accepted Answer

a dozen eggs and a dozen jellybeans

Question 7

The mole concept will most likely be used in

Revolt · Accepted Answer

determining how many ozone molecules are lost in the atmosphere.

Question 8

Which statement best describes a mole?

Revolt · Accepted Answer

It contains 6 point 0 2 times 10 to the 23th power particles of a given substance.

Question 9

Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?

Revolt · Accepted Answer

They both have the same number of atoms.

Question 10

Consider the equation. Na raised to the plus plus Cl raised to the negative right arrow NaCl power power Which statement best describes the relationship between the substances in the equation?

Revolt · Accepted Answer

The number of sodium ions is equal to the number of formula units of salt.

Pretest Answers

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